QGIS » QGIS Application

#include "qgslogger.h"

  QString connInfo = "dbname=" + txtDatabase->text();

  // Do we need TCP/IP connect info?

  if( txtHost->text() != "" )

      connInfo += "host=" + txtHost->text() + 

          " port=" + txtPort->text();

  // Do we need a username and password?

  if( txtUsername->text() != "" )

      connInfo += " user=" + txtUsername->text() + 

          " password='" + password + "'";

  QgsLogger::debug( "PQconnectdb("+connInfo+");" );

  QString database = settings.readEntry(key + "/database");

  QString connString = "dbname=" + database;

  if( host != "" )

  {

    connString += " host="+host;

    QString port = settings.readEntry(key + "/port");

    if(port.length() == 0){

      port = "5432";

    }

    connString += " port=" + port;

  bool makeConnection = true;

  bool searchGeometryColumnsOnly = settings.readBoolEntry(key + "/geometryColumnsOnly");

  bool searchPublicOnly = settings.readBoolEntry(key + "/publicOnly");

  if( username != "" )

    connString += " user="+username;

    if (password == QString::null)

    {

      // get password from user 

      makeConnection = false;

      QString password = QInputDialog::getText(tr("Password for ") + database + "@" + host,

                                               tr("Please enter your password:"),

                                               QLineEdit::Password, QString::null, &makeConnection, this);

      // allow null password entry in case its valid for the database

    }

    // Need to escape the password to allow for single quotes and backslashes

    password.replace('\\', "\\\\");

    password.replace('\'', "\\'");

    connString += " password='" + password + "'";

  int         myPart;

  // Note, several components (everything but dbname) are optional, so 

  // leave the value empty if not found.

  for( myPart = 0; myPart < conParts.size(); myPart++ )

    QStringList parm = QStringList::split("=", conParts[0]);

    if( parm.size() != 2 )

        continue;

    if( parm[0] == "host" )

        host = parm[1];

    if( parm[0] == "dbname" )

        database = parm[1];

    if( parm[0] == "port" )

        port = parm[1];

    if( parm[0] == "user" )

        username = parm[1];

    if( parm[0] == "password" )

    {

      // The password can have '=' and ' ' characters in it, so we can't 

      // use the split on '=' and ' ' technique - use indexOf() 

      // instead. 

      QString key="password='"; 

      int i = connInfo.indexOf(key); 

      if (i != -1) 

      { 

        QString pass = connInfo.mid(i+key.length()); 

        // Now walk through the string till we find a ' character, but 

        // need to allow for an escaped ' character (which will be the 

        // \' character pair). 

        int n = 0; 

        bool escaped = false; 

        while (n < pass.length() && (pass[n] != '\'' || escaped)) 

        { 

          if (pass[n] == '\\') 

              escaped = true; 

          else 

              escaped = false; 

          n++; 

        } 

        // The -1 is to remove the trailing ' character 

        password = pass.left(n); 

      } 

    }

  QString connInfo = "dbname="+database;

  if( host != "" )

    connInfo += " host=" + host + " port=" + port;

  if( username != "" )

    connInfo += " user=" + username + " password='"+password+"'";

  return connInfo;